html, body {
  margin: 100px auto;
  display: flex;
  align-content: center;
  background-color: antiquewhite;
  div {
    padding: 20px auto;
    /*默认不支持url图片加载，需要使用url-loader加载器*/
    background-image: url("../images/a.png");
    background-repeat: no-repeat;
    background-position: center;
    p {
      text-align: center;
      color: blue;
    }
  }
}
